The D8-TBox is a line transformer unit, consisting of eight toroidal line transformers, allowing low-impedance power amplifiers to be used for powering large public address audio systems with constant voltage levels of 100 Volt, 70 Volt and 50 Volt. Each line transformer has a rated power of 120 Watt, with an input impedance selectable between 4 Ohm and 8 Ohm. The secondary side of the transformer has power taps for use in 100 Volt, 70 Volt and 50 Volt audio distribution systems. The line transformer is housed in a solid 19°± rack mounting with a height of two units rackspace. The connectors for both in and output are performed using reliable Euro - Terminal blocks.